校历优化

tests/Jiaowu.Api.Tests/HolidayCnRangesTests.cs

@@ -0,0 +1,48 @@
+using Jiaowu.Api.Infrastructure.AcademicCalendar;
+
+namespace Jiaowu.Api.Tests;
+
+public sealed class HolidayCnRangesTests
+{
+    [Fact]
+    public void Group_merges_only_consecutive_days_with_the_same_name_and_status()
+    {
+        var ranges = HolidayCnRanges.Group(
+        [
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 1), true),
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 2), true),
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 3), true),
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 4), false),
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 5), true),
+            new HolidayCnDay("国庆节", new DateOnly(2026, 10, 7), true)
+        ]);
+
+        Assert.Collection(
+        ranges,
+        range =>
+        {
+            Assert.Equal("国庆节", range.Name);
+            Assert.Equal(new DateOnly(2026, 10, 1), range.StartsOn);
+            Assert.Equal(new DateOnly(2026, 10, 3), range.EndsOn);
+            Assert.True(range.IsOffDay);
+        },
+        range =>
+        {
+            Assert.Equal(new DateOnly(2026, 10, 4), range.StartsOn);
+            Assert.Equal(range.StartsOn, range.EndsOn);
+            Assert.False(range.IsOffDay);
+        },
+        range =>
+        {
+            Assert.Equal(new DateOnly(2026, 10, 5), range.StartsOn);
+            Assert.Equal(range.StartsOn, range.EndsOn);
+            Assert.True(range.IsOffDay);
+        },
+        range =>
+        {
+            Assert.Equal(new DateOnly(2026, 10, 7), range.StartsOn);
+            Assert.Equal(range.StartsOn, range.EndsOn);
+            Assert.True(range.IsOffDay);
+        });
+    }
+}